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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 6 |
| 3 | 12 |
| 4 | 30 |
| 5 | 124 |
| 6 | 122 |
| 7 | 418 |
| 8 | 98 |
| 9 | 220 |
| 10 | 346 |
| 11 | 308 |
| 12 | 1274 |
| 13 | 1144 |
| 14 | 962 |
| 15 | 556 |
| 16 | 2512 |
| 17 | 3526 |
| 18 | 1382 |
[4,6,12,30,124,122,418,98,220,346,308,1274,1144, 962,556,2512,3526,1382] |